MAX8778 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8778 Datasheet PDF : 34 Pages
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Dual Quick-PWM Step-Down Controller
with Low-Power LDO, RTC Regulator
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, VDD = VCC = 5V, TON = REF, TA = +25°C, unless otherwise noted.)
STANDBY AND SHUTDOWN INPUT
SUPPLY CURRENT vs. INPUT VOLTAGE
1
STANDBY (ONLDO = VIN)
0.1
0.01
0
SHUTDOWN
(ONLDO = ON1 = ON2 = GND)
5
10 15
20
25
INPUT VOLTAGE (V)
REFERENCE OFFSET
VOLTAGE DISTRIBUTION
70
+85°C
SAMPLE SIZE = 150
60 +25°C
50
40
30
20
10
0
-20 -12 -4
4
12
20
2V REF OFFSET VOLTAGE (mV)
REFIN2 OFFSET
VOLTAGE DISTRIBUTION
70
+85°C
SAMPLE SIZE = 150
60 +25°C
50
40
30
20
10
0
-5
-3
-1
1
3
5
REFIN2 OFFSET VOLTAGE (mV)
100mV ILIM THRESHOLD
VOLTAGE DISTRIBUTION
50
+85°C
SAMPLE SIZE = 150
40 +25°C
30
20
10
0
90 94 98 102 106 110
ILIM THRESHOLD VOLTAGE (mV)
LDO AND RTC POWER-UP
MAX17020 toc14
LDO AND RTC POWER REMOVAL
MAX17020 toc15
12V
A
12V
12V
A
B
12V
5V
5V
0V
0V
C
3.3V 3.3V
B
5V
D
0V
2.0V
2V
C
3.3V
D
0V
2.0V
200μs/div
A. INPUT SUPPLY, 5V/div C. 3.3V RTC, 2V/div
B. 5V LDO, 2V/div
D. 2.0V REF, 1V/div
200μs/div
A. INPUT SUPPLY, 5V/div C. 3.3V RTC, 2V/div
B. 5V LDO, 2V/div
D. 2.0V REF, 1V/div
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